Save-all foe paper machines



(No Model.)

G. C. 1:". SMIDTH.

SAVE-ALL FOR PAPER MACHINES.

No. 467,775. Patented Jan. 26, 1892.

llllll ATTORNEYS Y TN: Noms mans ce., wom-umu.. msnmcvsn, n. c.

UNITED STATns PATENT OFFICE.

GUSTAV CARL FAUGEL SMIDTH, OF FREDERICKSBERG, ASSIGNOR TO JENSEN tb GLAD, OF COPENHAGEN, DENMARK.

SAVES-ALL FOR PAPER-MACHINES.

SPECIFICATION forming part of Letters Patent No. 467,77 5, dated January 26, 1892.

Application iled December 19, 1890. Serial No. 375,231. (No model.) Patented in Denmark October 24, 1888, No. 962; in Norway June 26, 1889, No. 1,230, and in Sweden September 26,1889,No. 1,980.

.T all whom t may concern:

Be it known that I, GUsTAv CARL FAUGEL SMIDTH, a citizen ofthe Kingdom of Denmark, residing at Fredericksberg, in the Kingdom of Denmark, have invented certain new and useful Improvem ents in Save-Alls for Paper-Machines, (which wasV patented to me in Denmark, No. 962, dated October 2a, 1888; in Norway, No. 1,230, dated June 26, 1889, and in 1o Sweden, No. 1,980, dated September 26, 1889,)

of which the following is a speciiication.

This invention relates to an improved saveall for papenmachines so that from tive to ten per cent. of the fibers are recovered that would I5 otherwise be lost and run off with the water,

while the water-courses and sewers are relieved of a large quantity of troublesome matter; and the invention consists in a save-all for paper-machines which is formed of a supzo ply-trough having` discharge-holes and plugs for closing said holes and of a series of compartments with strainer-bottoms below said trough, said compartments being separated by by partitions having overflow recesses and gates for opening and closing said recesses, so

' that the backwater can be conducted through said compartments in a gradually-diminishing stream, so as to'deposit thereby the fibrous matter contained therein on the perforated or strainer bottoms.

In the drawings, Figure l represents a vertical transverse section of my improved saveall for paper-machines, taken on line 1 1, Fig. l2; and Fig. 2 is a plan of the same, with por- 3 5 tions broken away, drawn on a larger scale.

Similar letters of reference indicate corresponding parts.

In the drawings, A represents a series of compartments ot' equal size, which are provided with bottoms B, that are preferably covered with tine wire-gauze. The compartments are arranged in two parallel rows, as shown in the plan, each containing a superficial area of about one hundred and twenty square feet. The partitions C of the compartments are made of strong wooden framing, the bottoms being made ot' open-work frames of wooden slats and supporting-timbers, over which is stretched a layer of new or old paper-machine wire-gauze 5o or other straining material. Each compartment is connected with the adjoining ones by an overfiow-recess t at its upper edge, which recesses are closed by removable gates b, having handles b. Besides the overfiow-recesses a the outer side wall of each compartment is provided with a second recess d,throughwhich the water may be conducted to the outside of the compartment. The recesses d can also be closed by means of gates l). The recesses d serve for the purpose of conducting the over- 6o iiow from the last compartment of the series to the outside, all the remaining recesses d of the compartments being closed by the gates b. Alongitudinal trough D is arranged eentrally above the compartments "and provided with holes e in its bottom that are closed by plugs e', which may either be removed or replaced by hand or by means of a rack or pinion or otherwise, so as to open or close the supply-holes and run the backwaterinto any 7o particular compartment desired. The backwater is 'lirst conducted into the trough and distributed from the same successively to the different compartments, the fibers being collected by precipitation and filtration, While the backwater which passes through the strainer-bottoms is collected along inclined cemented bottoms to a central longitudinal trough T, collected in a cemented cistern or well W beneath and at one end of the appa- 8o ratus and retained for use, as it contains valuable sizing and coloring-matter.

The apparatus is used as follows: The backwater from the paper machine is conducted into the trough D and through one of the holes of the sameinto one of the compartments A- for instance, into No. 4, which will soon be filled. As it is notl of a sufficient capacity to contain all the water conducted to the same, owing to the factthatit cannot iiow o through 9o the closely-meshed bottom of the compartment, especially as the interstices of the same are quickly closed by the fine fibers deposited therein, the Water overflows into the adjoining compartment No. 5 through the recess a 95 in the partition between No. 4 and No. 5, from which the gate isremoved,and so on through the various compartments as far as No. 2. Some of the water passes ott through the strainerbottoms, while the remainder Hows me` over the recess d in the outer wall of No. 2. It is supposed that one compartment (in this oase No. 3) is shut off from therothers by the gates, soas to be emptied and ready for cleansing purposes or otherwise. As soon as the cleaning of the compartment No. 3 is finished it is connected again with the adjoining compartments, so that the overflow into the same and to the outside takes place from the same. The compartment No. 4 is next shut oft for emptying and cleaning, in which case the inlNuX of backwater commences in compartment 0.5. ed for the othercompartments in turn. When any compartment is shut off, the contents must stand for some timeto allow the fibers which have been collected to drain off and settle on the bottom, from which they may be gathered up and reused in the manufacture of paper. By increasing the number of compartments the overflow-recesses in they side Walls may be done away Withgbutas the stuft easily settles at the bottom a smaller appa- I ratus with overflow-recesses is preferable. The apparatus isplaced upon a brick foundation at the side of the Water-outlet of the mill or entrance of dust and dirt, as shown in dotted lines in Fig. l.

The same mode ot' procedure isadapt- Having thus described my invention, l claim as newr and desire to secure by Letters Patentl. A save-all for paper-machines, which consists of a series of compartments provided AWith strainer-bottoms and connected by overoW-recesses in their partitions, detachable gates for said overflow-recesses, and a distributing-trough above said compartments, provided With supply holes and plugs for opening or closing said holes, substantially as set forth.

2. A save-all for paper-machines, consisting Vof a number of compartments provided with foverIioW-recesses in the side Walls and With strainer bottoms, partitions provided with overflow-recesses, removable gates for the loverflow-recessesot the side Walls and partitions, and a distributing-trou gh extending Eabove thecompartment's and having supplyholes and plugs for opening or closing said holes, substantially as set forth.

In testimony that I claim the-foregoing as my invention-I have signed myname in pres- =ence of twosubscribing witnesses.

GUSTAV CARL FAUGEL SMID'IH.

Witnesses:v

SAPHUs `Jmvsniv, J'AooB BANDESEN. 

